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  Worksheet : Chemical Reaction and Equations 1. What is meaning of chemical reaction? 2. What does the symbol(aq) represent in a chemical equation? 3. What is wrong with the following equation: Mg + 2O -----> 2MgO 4. What will happen when we provide heat to Lead nitrate? 5. What will happen when we provide heat to Ferrous sulphate hepta hydrate? 6. If bromide of silver come in contact of sunlight than what will happen? 7. Which gas is evolved on heating Calcium Carbonate? 8. What is formula of Quick lime? 9. Which gases are evolved at anode and cathode on the electrolysis of water? 10. Why should magnesium ribbon be cleaned before burning in air?

 Social Science Class X CBSE board exam   1. Write the temperature requirement of Maize crop. Ans: 21 to 23 degree Celsius. 2. Why is agriculture called the backbone of Indian economy? Explain. Ans: Agriculture is called the backbone of Indian economy because seventy percent of Indian population are engaged in agriculture and raw material for the industrial sectors like food processing company, textile industry come from the agricultural sector. Its share in the GDP is also high. 3. Describe any five features of primitive subsistence farming. Ans: The features of primitive substance farming are given below: (i) It is practiced on small patches of land with the help of primitive tools like hoe, Dao and digging sticks with the help of family members. (ii) It depends upon monsoons, natural fertility of soil and environmental suitability. (iii) It is also called 'slash and burn' agriculture. (iv) Farmers clear a patch of land and produce crops for their sustenance. (v) When the so

POST FERTLISATION: STRUCTURE AND EVENTS  SOLVED WORKSHEET 4 1. Name the part of flower that contribute to fruit formation in strawberry and guava respectively. Ans:   (i) In strawberry, the fruit develops from the ovary, other floral parts degenerate and fall off Thalamus also contributes to fruit formation. (ii) Guava, the wall of ovary develops into the wall of fruit called pericarp. 2. Banana is a true fruit but is also a parthenocarpic fruit. Give reason? Ans: The fruit of banana is formed from the ovary, so it is a true fruit. It is a parthenocarpic fruit because the ovary develops into fruit without fertilisation and is thus, seedless. 3. Why is apple referred to as a false fruit? Ans: In apple, the Thalamus also contributes to fruit formation. So, apples are called false fruits. 4. List the post fertilisation events in angiosperms. Ans: The post fertilisation events in angiosperms are: (i) Endosperm and embryo development (ii) Maturation of ovule into seed (iii) Maturation of

 SEXUAL REPRODUCTION IN FLOWERING PLANTS: Solved Worksheet 3 1. Give an example of plant that came to India as contaminant and is a cause of pollen allergy. Ans: Parthenium or Carrot Grass. 2. State the function of filiform apparatus found in mature embryo sac of an angiosperm. Ans: Filiform apparatus helps to guide the path of pollen tubes into synergid. 3. How many microsporangia are present in a typical anther of angiosperm. Ans: Usually Four. 4. Mention the ploidy of the different types of cells present in the female gametophyte of an angiosperm. Ans:  Synergids  = n (haploid) Egg = n (haploid) Polar nuclei = n(haploid) Antipodals = n(haploid) All type of cell of female gametophyte are = n (diploid). 5. Why do cleistogamous flowers assure seed sets? Ans: Cleistogamous flowers are invariably autogamous as there is no chance of cross pollination. 6. Write one advantage and one disadvantage of cleistogamy to flowering plants. Ans:   Advantage: Assured seed set/maintain purelines. D

HUMAN REPRODUCTION Unsolved Worksheet-2  BOARD BASE QUESTION 1. When do the Oogenesis and the spermatogenesis initiate in human females and males, respectively?  2. How does the sperm penetrate through the zona pellucida in the human ovum ? 3. Where is acrosome present in humans ? Write its function. 4. What is function of Luteinizing hormone in human males ? 5. What is the function of middle piece of human sperm ? 6. Write the effect of the high concentration of L.H. on a mature graafian follicle. 7. Mention the relationship between pituitary gland and ovarian hormones during a menstrual cycle. 8. How many primary follicles are left in each ovary in a human female at puberty ? 9. Where does spermatogenesis occur in human testis ?  10. Trace the path of spermatozoa from the testis upto the ejaculatory duct only. Comment for answers

 Human Reproduction : Unsolved Worksheet 1. Name the pouch in which the human testes are present. 2. Write the location and function of the Sertoli cells in humans. 3. Write the location and function of Leydig cells in humans? 4. Name the cells that nourish the germ cells in the testes. 5. Why the human testes are located outside the abdominal cavity. 6. Write the location and function of myometrium and endometrium. 7. What is the difference between Vas deferens and Vas efferentia ? 8. Name the male accessory glands in humans and write their functions. 9. What is function of Cowper's Gland ( Bulbourethral gland )? 10. What Spermatogenesis? Give comment for answers🙏

 Arithmetic progressions: Unsolved Worksheet 1 1. Find the common difference of given AP: 1/a, 3-a/3a, 3-2a/3a,....... (a≠0). 2. How many two digits numbers are divisible by 3? 3. In an AP, if the common difference (d) = -4 and the seventh term (a7) is 4, then find the first term. 4. What is the common difference of an AP in which a21-a7=84? 5. For what value of k will k+9, 2k-1 and 2k+7 are the consecutive terms of an AP? 6. Find the 9th term from the end(towards the first term) of the AP 5, 9, 13,......, 185. 7. Find the sum of first 20 terms of the following AP 1, 4, 7, 10,............ 8. The sum of the first 7 terms of an AP is 63 and that of its next 7 terms of an AP is 63 and that of its next 7 terms is 161. Find the AP. 9. Which term of the AP 3, 15, 27, 39, ..... will be 120 more than its 21st term? 10. Find, how many two digit natural numbers are divisible by 7?

 MCQs SOCIAL SCIENCE 1. What kind of movement was launched by the tribal peasants of Gudem Hills in Andhra Pradesh?   (a) Satyagraha Movement  (b) Militant Guerrilla Movement  (c) Non-Violent Movement  (d) None of the above  Ans : (b) 2. ‘Hind Swaraj’ was written by:  (a) Abul Kalam Azad  (b) Mahatma Gandhi  (c) Sardar Patel  (d) Subhas Chandra Bose Ans : (b) 3. Why did the Indians oppose the Rowlett Act?  (a) It introduced the Salt Law.  (b) It increased taxes on land.  (c) It gave the British the power to arrest and detain a person without a trial.  (d) It put a ban on the Congress party.  Ans : (c)  4. The resolution of Poorna Swaraj was adopted at which session?    (a) Karachi Congress  (b) Haripur Congress  (c) Lahore Congress  (d) Lucknow Congress  Ans : (c) 5. Arrange the following historical events in a chronological sequence   I. Rowlett Act  II. Kheda Satyagraha  III. Champaran Movement  IV. Ahmedabad Mill Strike Choose the Correct option:  a) I, II, III, IV  b) II, I, III, I

  होली:  खुशियों का त्यौहार  होली रंगो एवं खुशियों का त्यौहार है।  आज के दिन सभी लोग अपने सभी गिले शिकवे भूलकर एक दूसरे के गले मिलते है। सभी अलग अलग रंगो से होली को खूब रंगदार बनाते है और साथ ही साथ विभिन्न प्रकार के व्यंजन जैसे गरम गरम पकोड़े, गुजिया आदि का भरपूर आनद लेते है।  इन सभी के बीच होली खेलते हुए कुछ खास बातो का ध्यान रखना भी जरूरी है। हम इन्ही बातो को आपके साथ शेयर करने जा रहे हैं।  1. आजकल बाजार में कुछ ऐसे रंग मौजूद है जो आपकी या आपके बच्चे की स्किन को नुकसान पहुंचा सकते हैं। तो रंग खरीदते समय रंग की गुणवत्ता को जरूर देखे।  2. आप प्राकृतिक रंग अपना सकते है। जो की बाजार में आसानी से मिल जाता हैं।  थोड़ा महंगा मिल सकता है। लेकिन प्राकृतिक रंग ही ले।  3. सुबह से ही आप अपने चेहरे पर कोई क्रीम(चेहरे की) वैसलीन या नारियल तेल लगा सकते हैं। ये सब खराब रंग से आपकी त्वचा की रक्षा करेेंगे।  4. अगर कोई आपको किसी प्रकार का बेकार रंग लगाए तो उसे बार बार साबुन से धोने से बचे। क्योंकि साबुन भी एक प्रकार का रसायन ही है अगर आप बार बार साबुन को रंग पर लगाएंगे तो साबुन उससे प्रतिक्रिया करेगा जि

    एग्जाम में अच्छे नंबर कैसे लाये। प्रिय पाठको,             किसी भी परीक्षा में अच्छे नंबर लाने का  कोई शॉर्टकट नहीं होता। लगातार लम्बे समय तक जो छात्र अच्छी  तरह से विषय को पढ़ते है तथा पढ़ी हुई सामग्री का बहुत अच्छे तरह से रिवीजन करते है उनके नंबर हमेशा ही बहुत अच्छे आते है.  हम आपको यंहा कुछ ऐसे टिप्स दे रहे है जो की आप पढ़ कर एवं उन्हें फॉलो करके अच्छे मार्क्स ला सकते है.  १. सबसे जरुरी जब आपकी क्लास में टीचर पढ़ा रहा होता है तो उसे अच्छी तरह  सुनने की कोशिश करे एवं साथ साथ नोट्स बनाये। २. बनाये  गए नोट्स का घर पर जाकर रिवीजन जरूर करे।  ३. अगर कुछ समझ  ना आये तो अगले दिन अपने टीचर से जरूर पूछे।  ४. घर में पढाई करने का एक निश्चित स्थान बनाने की कोशिश करे।  ५. पढाई वाले स्थान के आसपास कोई नोटिस बोर्ड या चार्ट पेपर लगाए।  ६. चार्ट पेपर या नोटिस बोर्ड पर इम्पोर्टेन्ट बातो को लिखे या फिर उन बातो को लिखे जो आप बार बार भूलतें  है. ७. सबसे जरूरी काम, आप अपने पढाई का एक निश्चित  टाइम टेबल बनाइये  एवं उसे अच्छी  तरह से फॉलो करिये।  ८. सोशल मीडिया पर ज्यादा सक्रिय रहने की जरूरत नहीं है।  ९. यूट

Fast Revision 1. Synapse is a small gap between neurons where nerve impulse passes from one neuron to the next. 2. Peripheral nervous system consists of all the nerves, i.e. the Cranial, Spinal and Visceral, connecting the CNS with the body. 3. Tropic movement: These movements of based on direction. example: phototropism etc. 4. Nastic movement: These movements occurs irrespective of direction of stimulus. example: photonasty. 5. Auxins help in cell elongation and division. 6. Gibberellins help in stem and flower growth. 7. Cytokinin promote cell division and delay ageing of leaves. 8. Abscisic acid inhibits growth. 9. Ethylene is a ripening hormone. 10. Endocrine gland: That gland which secrets hormones direct into blood.(Ductless gland) 11. Exocrine gland: That gland which secrets their secretion into duct.(Duct gland) 12. Heterocrine gland: Which have both ability Duct as well as Ductless. Example: Pancreas. testis, ovary. 13. When pancreas release insulin or glucagon i

  Important Q/A 1.How is the wall of small intestine adapted for performing the function of absorption of food? Ans: The primary function of the smell intestine is the absorption of nutrients and minerals found in food with the help of numerous finger like projections called villi present in the inner lining of small intestine, which increase the surface area of absorption. 2. Out of goat and tiger which one will have a longer small intestine? Justify your answer. Ans:   Herbivores like goat, need longer small intestine to facilitates the digestion of cellulose, meat is easier to digest hence carnivores like tiger have small intestine. 3. Name the movement of food all along the gut. Ans : The lining of the alimentary canal has muscles which contract rhythmically to push the food forward. This movement is know as peristalsis. 4. Name the process in plants that links light energy with chemical energy. Ans: Photosynthesis 5. Name the organisms that can prepare their own food. Ans: Autotr

 Activity Based Q/A 1. The function of KOH taken in the test tube is to absorb: (a) released water vapours (b) released Carbon di oxide  (c) released oxygen (d) chlorophyll 2. The event that does not occur in photosynthesis: (a) absorption of light energy by chlorophyll (b) reduction of carbon dioxide to carbohydrates (c) oxidation of carbon to carbon dioxide (d) conversion of light energy to chemical energy 3. Iodine solution gives blue black colour with (a) starch    (b) proteins (c) glucose (d) fats 4. Which substance breaks down starch? (a) Lipase (b) Amylase (c) Complex sugar (d) Trypsin 5. Which of the following would be found in greater amounts that usual in the undigested waste as a consequence of removal of part of the smell intestine where much of the absorption takes place? (a) Protein fragments (b) Complex sugars (c) Starch (d) Amino acids 6. Name the parts of the human digestive system where digest of food does not take place. Ans: In the human alimentary canal, the parts

  Chemical Reaction and Equations Q1. What is the meaning of chemical reaction? Ans: It is a process which transforms one or more substances into new substances with new properties. Q2. What is chemical equations? Ans: A chemical equation is a statement used in chemistry to represent a chemical reaction. Q3. What are reactants? Ans: The substances which take part in a chemical reaction are called reactants. Q4. What are products? Ans: The substance which are formed as a result of chemical reactions are called products. Q5. What is the meaning of balanced chemical equation? Ans: The chemical equation in which total number of atoms of reactants is equal to the total number of atoms of products is known as 'Balanced Chemical Equation'. Q6. What is skeletal equation? Ans: A chemical equation in which the number of atoms of each kind are not equal in the reactants and products is called unbalanced chemical equation or skeletal equation. Q7. What method we can use to balanced chemica

  Law of inheritance( Mendel's  law) First law of inheritance -   Mendel's law of dominance states that:  “ When parents with pure, contrasting traits are crossed together, only one form of trait appears in the next generation" .  The hybrid offsprings will exhibit only the dominant trait in the phenotype.”  Law of dominance is known as the first law of inheritance. Second law of inheritance- Law of segregation is the second law of inheritance.  "Law of segregation states that the pair of alleles segregates from each other during meiosis (gamete formation) so that only one factor will be present in each gamete".   Third law of inheritance:- The Law of Independent Assortment states that  "during a dihybrid cross (crossing of two pairs of traits), an assortment of each pair of traits is independent of the other" .  In other words, during gamete formation, one pair of trait segregates from another pair of traits independently. very important Q/A

 Electrolytic reduction and Electrolytic refining 1. What is the difference between Electrolytic reduction and Electrolytic refining? Ans : ELECTROLYTIC REDUCTION:   The salts of these metals like chlorides in molten form are electrolysed. Metal is deposited at the cathode ( negative electrode) and chlorine is liberated at the anode ( positive electrode). The reactions are as follows: At cathode  Na+   +   e-     →   Na ( Reduction) At anode  2Cl-     →   Cl2   +    2e-   (Oxidation) ELECTROLYTIC REFINING :  It is the process of purification of the metal obtained after reduction. Various methods for refining are employed, but the most common one is the electrolytic refining. Process:  1. In this process, a thick block of impure metal is used as anode. 2. A thin strip of pure metal is used as cathode. 3. A solution of metal salt is used as an electrolyte. 4. When electric current is passed, metal ions from the electrolyte are reduced as metal which get deposited on the cathode. 5. An eq

 Chemical Reactions and Equations 1. How photochemical reactions have played an important role in photography? Ans: A photography film used in black and white photography is a type of coating with silver chloride. Its working is based on the decomposition of silver chloride in the presence of sunlight.                                                 2AgCl  + Sunlight   →   2Ag   +  Cl2

 Life Process 1. Why does the small and single celled animals such as amoeba, not require any respiratory pigment? Ans: The amoeba does not require any respiratory pigment to transport oxygen. The possible reason could be that their body size and number of cells are small. Its oxygen requirement is met by diffusion. 2. Where do the respiratory pigments combine reversible with oxygen? Ans : Respiratory pigments are coloured proteins capable of combing reversibly with oxygen, hence increasing the amount of oxygen that can be carries by the blood. 3. Why does the air passage not collapse when there is no air in it? Ans: The air passage, i.e. trachea is supported by incomplete C-shaped cartilaginous rings, which prevent its collapsing in the absence of air. 4. While breathing out, point out the change you think occur in diaphragm and intercostal muscles. Ans: The diaphragm and intercostal muscles relax when we breathe out. This compresses the chest cavity forcing the air out of lungs. 5.